The latest snafu? On Friday, Air France's unions called for four days of strikes to occur right as high season kicks into high gear from June 23 through June 26. The ten unions calling for the strike represent pilots, cabin crew, and ground personnel (that is, everyone you need to show up to work if you want to catch a flight), according to Bloomberg. A pay deal was put forward by Air France-KLM last month, but was rejected by the unions, prompting the resignation of the airline group's president, Jean-Marc Janaillac. His interim replacement, Anne-Marie Couderc, will meet with the unions later this week to try to come to a deal before the strikes take place, The Local reports. Air France employees are looking for a 5.1 percent wage increase across the board and the call for strike action is still in place, despite the scheduled meeting on June 14. "This position is incompatible with the collective interest and with any concern for the company’s future," reads a statement from the airline.

If a deal isn't secured, expect canceled flights during those four days, and potentially beyond (the unions have said they may extend the strike if their demands aren't met. If you already have a reservation on Air France or its low-cost subsidiary Joon during the proposed striking period, contact the airline as soon as possible to see if you can reschedule. While Air France did not immediately respond to a request for more information about passenger recourse, during past strikes—and there have been many—the airline has offered free rebooking for reservations disrupted by strikes.

The airline's unions have already staged 15 days of strikes this year over demands for higher wages and cost the airline more than $470 million, Reuters reports. March and April were particularly rough months for travel in France, as action from Air France's employees coincided with strikes from the air traffic controllers' union and French rail workers (the rail strikes are only set to end on June 28).